Sarcoidosis.

Sarcoidosis is a systemic granulomatous disease of unknown cause that most commonly affects the lungs, lymph nodes, skin, eyes, spleen, bone, and glandular tissue. The diagnosis is made when characteristic histologic findings are demonstrated and other granulomatous processes are excluded. It can be an acute or chronic debilitating disease, but in patients with acute disease the process can be self-limited. Multiple therapeutic options have been described both for the cutaneous and systemic lesions of sarcoidosis. Steroids, however, remain the cornerstone of therapy.